Added test for embedded values in ProtocolElements.
Added test for embedded values in ProtocolElements.

ohsu-computational-biology/server,srblum/hackathon-server,saupchurch/server,david4096/ga4gh-server,macieksmuga/server,ohsu-computational-biology/server,srblum/server,dcolligan/server,david4096/ga4gh-server,srblum/server,ga4gh/server,david4096/ga4gh-server,adamnovak/server,srblum/server,macieksmuga/server,diekhans/ga4gh-server,diekhans/ga4gh-server,adamnovak/server,ga4gh/server,dcolligan/server,saupchurch/server,ohsu-computational-biology/server,srblum/hackathon-server,diekhans/ga4gh-server,adamnovak/server,srblum/hackathon-server,saupchurch/server,ga4gh/server,dcolligan/server,macieksmuga/server